| Period |
Total Population Estimate |
Total Resident Estimate (4) |
Crude Birth Rate (2) |
Crude Death Rate (2) |
Natural Increase |
Infant Mortality Rate (3) |
Marriages |
| Year (1) | |||||||
| 2005 | 21,500 | 13,700 | 20.4 | 6.6 | 14 | 21.4 | 755 |
| 2006 | 23,700 | 14,800 | 18.8 | 5.7 | 13 | 10.8 | 707 |
| 2007 | 21,000 | 14,700 | 19.7 | 5.9 | 14 | 13.8 | 785 |
| 2008 | 22,100 | 14,200 | 18.4 | 4.1 | 14 | 3.8 | 702 |
| 2009(p) | 22,500 | 13,300 | 19.2 | 5.6 | 14 | 7.8 | 753 |
| QUARTER | |||||||
| 2005 | |||||||
| Mar | 20,300 | 13,300 | 4.5 | 2.0 | 2 | 50.0 | 166 |
| Jun | 21,500 | 13,700 | 5.1 | 2.0 | 3 | 28.6 | 187 |
| Sep | 22,500 | 13,800 | 6.1 | 1.2 | 5 | - | 210 |
| Dec | 24,900 | 14,000 | 4.7 | 1.4 | 3 | 15.2 | 192 |
| 2006 | |||||||
| Mar | 22,700 | 14,600 | 4.7 | 1.2 | 3 | - | 117 |
| Jun | 23,700 | 14,800 | 5.6 | 1.9 | 4 | 36.1 | 181 |
| Sep | 23,500 | 14,900 | 4.8 | 1.5 | 3 | - | 193 |
| Dec | 22,800 | 14,700 | 3.7 | 1.2 | 3 | - | 216 |
| 2007 | |||||||
| Mar | 19,600 | 14,800 | 5.3 | 1.6 | 4 | 12.7 | 144 |
| Jun | 21,000 | 14,700 | 5.4 | 1.2 | 4 | 12.7 | 233 |
| Sep | 21,300 | 14,600 | 5.3 | 1.6 | 4 | 12.8 | 196 |
| Dec | 24,300 | 14,000 | 3.8 | 1.6 | 2 | 18.9 | 212 |
| 2008 | |||||||
| Mar | 20,700 | 14,100 | 4.1 | 1.1 | 3 | - | 140 |
| Jun | 22,100 | 14,200 | 5.6 | 0.9 | 5 | - | 220 |
| Sep | 22,200 | 13,900 | 4.4 | 0.9 | 3 | - | 190 |
| Dec | 23,500 | 13,100 | 4.7 | 1.2 | 4 | 16.1 | 152 |
| 2009 | |||||||
| Mar(r) | 21,200 | 13,300 | 3.8 | 1.7 | 2 | 20.0 | 138 |
| Jun(p) | 22,500 | 13,300 | 5.5 | 1.4 | 4 | 13.7 | 200 |
| Sep(p) | 24,000 | 13,100 | 4.9 | 1.7 | 3 | - | 211 |
| Dec(p) | 24,400 | 12,000 | 5.7 | 0.8 | 5 | - | 204 |
Source: Cook Islands Statistics Office
Notes:
(1) Mid year population estimated at June Quarter
(2) Crude birth rate and crude death rate are calculated per thousand Resident Population as of 1992
(3) Infant mortality rate is calculated per thousand births
(4) Resident population comprises only those normally resident in the Cook Islands